Process of producing paper pulp



Patented Apr. 27, 1926. v p

UNITED STATES PATENT OFFICE.

EDDIE LAMBERT AiN'D WALTER ElVIATITEWS, BALTIC, CONNEfiTICUT. i

I rnoonss or rnonuomernrnn we. .No Drawing. Application filed. August 26, 1922. Serial 1T0. 584,571.

To all whom it may concern: i employ about one pound ofthe a-lkali with Be it known that We, EDDIE LAMBERT and sufficient water to cover approximately one 35 lVAL'rnR E. MATHEWS, citizens of the United hundred pounds of the fibrous material. States, residing at Baltic, in the county In this step the fibers are softened and sepa- 5 of New London and State of Connecticut, rated, and all resinous matters are removed.

have invented certain new and useful Im- The pulpy mass produced in accordance provements in Processes of Producing Paper with the foregoing step is then washed with 40 Pulp, of which the following is a specificawater to remove all dirt and foreign matter, tion. and is next ground again, and if desired This invention relates to a process of finally bleached by any suitable agent such,

treating Wood pulp for employment in the for example, as chloride of lime. The manufacture of paper. I-Ieretofore it has pulp is then ready for use in the manufac- 45 been found practical to employ only certain ture of paper. 7 kinds of Wood such, for example, assp'ruce, It has been found that by carrying out hemlock, and poplar, it being customary, this process it is possible to make use of furthermore, to carefully select the stock. practically any kind of Wood, and the prod- As this necessity for selection of certain 'uct is a highly desirable one. s 50 kinds and grades of Wood is the chief item Having thus described the invention, What of expense in the manufacture of paper, is claimed as new is: I the present invention has'as its object to The process of treating Wood stock for evolve a process of treatment of any and the praparation of paper pulp Which comall kinds of Wood for thepreparation of prises comminuting the stock, boiling the 55 pulp which may besuccessfully employed same fora period of approximately one in the manufacture of a reasonably good: hour in a solution of one pound of caustic quality of paper. Y potash in sufiicient water to cover approxi- In carrying out the invention stock of mately one hundred pounds of the stock, any kind of woodin a more or less divided washing the stock to remove the dirt, and re state as, for example, in the form of chips grinding the cleansed stock. I or sawdust is comminuted in a grinding In testimony whereof We affix our signamachine of any approved type. The ground tures.

fibrous mass is then boiled-in a solution of an alkali such as caustic potash for a period EDDIE LAMBERT. [L. s] of about one hour, it being preferable to WALTER E. MATHEWS. [11. s.] 

